Combined square and bevel



(No Model.) 2 Sheets Sheet 1. A. G. CHASE.

COMBINED SQUARE AND BEVEL. No. 445,389. Patented Jan. 27, 1891.

(No Model.) 2 Sheets-Sheet 2 A. G. CHASE.

GOMBINED SQUARE AND BEVEL.

No. 445,389. Patented Jan. 27,1891.

UNITED STATES PATENT OFFICE.

ARTHUR G. CHASE, OF BOSTON, MASSACHUSETTS.

COMBINED SQUARE AND BEVEL.

SPECIFICATION forming part of Letters Patent No. 445,389, dated January 27, 1891..

Application filed May 22, 1890. Serial No. 352,692. (No model.)

To all whom it may concern:

Be it known that I, ARTHUR G. CHASE, of Boston, in the county of Suffolk, State of Massachusetts, have invented certain new and useful Improvements in Combination Threshold Square and Bevel, of which the following is a description sufficiently full, clear, and exact to enable any person skilled in the art or science to which said invention appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which Figures 1 and 2 are side elevations of my improved bevel and square, the blade being shown at different angles; Fig. 3, a bottom plan View; Fig. at, an end elevation; Fig. 5, a vertical transverse section of the same; Fig. 6, a like view enlarged, and Fig. 7 a longitudinal section on line y y in Fig. 6.

Like letters of reference indicate corresponding parts in the different figures of the drawings.

My invention relates especially to bevelsquares for marking the angles on door-sills to fit thejamb-rabbets; and it consists in certain novel features hereinafter fully set forth and claimed, the object being to produce a simpler, cheaper, and more effective device of this character than is now in ordinary use.

The nature and operation of the improvement will be readily understood by all conversant with such matters from the following explanation.

In the drawings, A represents the stock or body, and B the blade. The stock is triangular in cross-section, and is provided on its lower face with a metallic wear-plate 1), slotted centrally and longitudinally at (l, as shown in Fig. 3. The body is also slotted through its apex and in alignment with the plateslot. .Two rectangular buttons f, which also serve as guides, are pivoted to the face of the plate I). The bladeBis fitted to swing vertically in the grooves 01. A centrally-arranged longitudinal groove opens into the stock-slot d, and a ball g is fitted to work in said groove and a longitudinal slot h in the blade B, pivoting said blade to the stock. A rectangular shoulder 't' is formed on one edge of the blade. A clamping-rod m is arranged longitudinally in the stock, and has an eccen= trio or cam portion p adapted to engage and lock the blade when said rod is rotated. The outer end of the rod is provided with a rosette g.

In the use of my improvement an inclined face of the stockis disposed against the beveled edge of the threshold and the tongue B employed to mark the lines of the janib-rabbets therein. The buttons f serve as guides when the face of the wear-plate is disposed on the sill. The plate I) overlapsthe edges of the stock slightly to engage the outer edge of the sill-bevel.

Having thus explained my invention, what I claim is 1. In a beve1-square, a body or stock triangular in cross-section and slotted vertically and longitudinally, in combination with a slotted blade and a ball disposed in the stockslot and forming a pivot for said blade, sub stantially as and for the purpose set forth.

2. In a bevel-square of the character described, the combination of a triangularbody or stock slotted and grooved longitudinally, with a slotted blade, a ball disposed in said stock-groove and forming a pivot for said blade, and a rotary clamping-rod mounted in said stock, substantially as set forth.

3. In a bevel-square of the character described, a stock triangular in cross-section and provided with a face-plate, said stock and plate being slotted longitudinally, in combination with a ball disposed in said stock, a slotted blade pivoted on said ball, and a rotary clamping-rod, arranged substantially as described.

I. In a bevel-square of the character described, a stock triangular in cross-section and a plate secured to one face thereof and extended beyond its edges, in combination withv a slotted blade disposed in a longitudinal slot in said stock, a ball working in a groove in said stock, on which said blade is pivoted, a cam-rod for clamping the blade, and

rectangular blocks or buttons pivoted to said face-plate, substantially as described.

5. In a bevel-square of the character described, the stock A, provided with the slot 61, and ball g, working in a groove opening into said slot, in combination with the slotted ICO blade B, pivoted on said ball, substantially as set forth.

6. In a bevel-square of the character described, the stock A, provided with the slot (Z,

5 ball 9, the face-plate Z), the slotted blade B, pivoted on said ball, and the binding-rod in, arranged to operate substantially as described.

7. In a bevel-square of the character de- 10 scribed, the stockA and face-plate Z7, provided with slots d, in combination With the slotted blade B, the ball g, on which said blade is pivoted in the stock-slot, the binding-rod m, and buttons f, arranged substantially as and for the purpose set forth.

ARTHUR G. CHASE. Witnesses:

OHAs. G. W. CAPEN, Mrs. Z. M. OAPEN. 

